HP 10bII+, User Manual

Page: 26 / 187

At a Glance... 18
Using the following data, find the means of
x
and
y
, the sample standard deviations of
x
and
y
, and the
y-
intercept and the slope of the linear regression forecast line. Then, use summation
statistics to find
xy
.
For more information on statistical calculations, refer to chapter 12, Statistical Calculations .
x-
data 2 4 6
y-
data 50 90 160
Table 1-31 Statistics example
Keys Display Description
\t
0.00 Clears statistics registers.
GÆV:¡
1.00 Enters first
x
,
y
pair.
YÆd:¡
2.00 Enters second
x
,
y
pair.
SÆJS:¡
3.00 Enters third
x
,
y
pair.
v¡
1 2.00 Reviews entered statistical
data, starting with the initial
x
-value. Press
1
to scroll
through and verify the
entered statistical data.
Press
M
to exit.
\k 4.00 Displays mean of
x
.
\« 100.00 Displays mean of
y
.
\h 2.00 Displays sample standard
deviation of
x
.
\«
55.68 Displays sample standard
deviation of
y
.
\T\« -10.00 Displays
y -
intercept of
regression line.
\W\«
27.50 Displays slope of regression
line.
]f 1,420.00
Displays
xy
, sum of the
products of
x -
and
y -
values.
Σ
Σ